The article deals with Bulgakov’s critique of Hegel’s monistic system. For Bulgakov, Hegelian monism is an example of philosophical reductionism which aims at reducing the question of Being, the latter expressed by a proposition and constituted by the inseparable unity of three elements (person as hypostasis, its meaning and the essence of Being), to its second principle. Contrary to Hegel, Bulgakov claims that no philosophy can begin with and as itself—it has to be initiated with a datum. This is in fact where the tragedy of German philosophy, and each monistic philosophy, starts.